Students from Fisk University in Nashville marched toward Tennessee's Capitol building before staging a sit-in in the middle of a street.

In Oregon, dozens of people blocked traffic in downtown Portland and forced a delay for trains on two light-rail lines. Media reports said the crowd grew to about 300 people, including some who sat in the middle of a road. The crowd of anti-Trump protesters burned American flags and chanted, "That's not my president."

In Seattle, about 100 protesters gathered in the Capitol Hill neighborhood, blocked roads and set a trash bin on fire.

In Pennsylvania, hundreds of University of Pittsburgh students marched through the streets, with some in the crowd calling for unity. Campus protests also erupted at the University of Texas, the University of Connecticut, the University of California, Berkeley and other University of California campuses.

On Twitter, the hashtag "NotMyPresident" had been used nearly half a million times.